Mercury - Quicksilver Forward Gear Set Sterndrive Drivetrain Component Heat-Treated Steel 14063A1. Overview. You can tell a lot about a drive by how it feels when you throttle forward. When it's right, the shift is smooth, the sound is clean, and the power feels direct. The Mercury Marine 14063A1 Quicksilver Forward Gear Set brings that feel back to your MerCruiser Bravo One or Bravo One X sterndrive. Each gear is precision-cut and heat-treated to handle heavy torque without chatter or wear. It'